US2593370A - Combination dairy, vegetable, and storage refrigerator - Google Patents

Description

A ril 15, 1952 v. P. WARRENJL 2,593,370

COMBINATION DAIRY, VEGETABLE, AND STORAGE REFRIGERATOR 2 SHEETS-SHEET 1 Filed June 8, 1948 49 asmosn N6 1444 v5 grwwwto'b VIRG'IL R WARRENI April 15, 1952 v, p, WARREN, 11: 2,593,370

COMBINATION DAIRY, VEGETABLE, AND STORAGE REFRIGERATOR Filed June 8, 1948 2 SHEETS--SI-IEET 2 3mm VIRG/L R WARREN D r4 7' TORNE'YS Patented Apr. 15, 1952 OFFICE f COMBINATION DAIRY, VEGETABLE, AND STORAGE REFRIGERATOR Virgil P. Warren, II, Atlanta, Ga.

Application June 8, 1948, Serial No. 31,644

This invention relates to a multi-compartment refrigerator, more specifically to a refrigerator having adairy compartment, a vegetable tray or bin and a storage compartment.

In common practice, separate refrigerators are used for vegetables and dairy products; and, while in some instances two separate compart ments have been embodied in a single refrigerator casing for refrigerating different types of foods at different temperatures, these have not been arranged in a manner to make the respective compartments readily accessible and to serve for display purposes.

An object ,of the present invention, therefore, is to provide in a single refrigerator casing or chassis, three separate compartments, one for storing dairy products, one for storing vegetables, and the third or storage compartment for star ing either or both of these, all of which compartments are readily accessible to the user, and

the first two of which will display the foods contained therein.

A more specific object of the present invention is to provide a combination vegetable, dairy products and storage refrigerator having an upper dairy products cabinet, a central open type vegetable tray or bin, and a lowermost storage compartment for storing dairy products, or. vegetables, or both, the refrigerator embodying a system involving two branch refrigerant feed lines,

one which supplies the dairy compartment and vegetable bin, and the other which. suppliesthe storage compartment so as to provide different temperatures in the respective compartments suitable for the types of foods contained therein.

A further specific object of the invention is to provide in a multi-compartment refrigerator having a permanently open front wall, an upper display dairy compartment which i inset with respect to the front wall and an open type bin below the dairy compartment suitable for storing vegetables or other foods and extending below the front opening so that a person may lean into the opening and help himself to such vegetables or other foods stored in the open type lower bin.

Other objects and advantages will become more apparent from a study of the following specification, taken with the accompanying drawing wherein:

Figure 1 is a front view of a refrigerator including dairy, vegetable and storage compartments in accordance with the principles of the present invention;

8 Claims. (Cl. 62-895) 2 refrigerator cabinet shown in Figure 1, and showing the refrigeration system employed for cooling the interior of the respective cabinets; and,'.

Figure 3 is a somewhat enlarged front view, similar to Figure 1, shown partly cut away and more clearly showing the internal refrigerating coils.

Referring more particularly to the drawings, numeral 1 denotes, generally, a refrigerator casing or chassis lined with any suitable heat insulating material. The refrigerator has a depending hood 2 at the top front portion thereof below which there is provided a permanent opening 3 extending throughout the entire width. No door is provided for such opening 3 and the opening is made high enough to allow persons to. lean in and help themselves to products which are stored inthe center compartment which will be described hereinafter. Y

At the top of the refrigerator, a dairy products compartment or cabinet 4 is inset with. respect to the front opening 3 and hood 2, and comprises a lower shelf 5 and a vertical wall 6 comprising horizontally sliding doors such as 1 and 8. These doors may be made of hard rubber or any other suitable material and are preferably provided with glass panes, such as la and 8a, respectively, so that the dairy compartment can function as a display compartment or cabinet. The doors may be slidable on hard rubber tracks such as 9 and [0. A blower fan l'l driven by motor i2 is encased in a casing or housing l3 located within the dairy products compartment. Grille work His provided in casing 13 adjacent to the fan, also the lower part of the casing I3 is open, to permit circulation of air through the finned refrigerating coils [5 which are enclosed within the casing to form a blower evaporator to refrigerate the dairy compartment.

Below the dairy compartment 4 there is provided a vegetable bin or compartment l6 preferably having a front vertical glass panel I! and a plurality of vertically disposed divider or partition walls [8 for separating different types of vegetables, forming separate bins. Compartment i6, therefore, constitutes a vegetable display compartment of the open type. The vegetable compartment is refrigerated by means of upper horizontally disposed finned coils H! at the roof of the compartment 16 and vertically disposed finned coils 20 at the rear of the compartment, which coils are concealed by a series of louvres 2| and 22, respectively, to permit free circulation of air between the space in the vicinity of the coils and Figure 2 is a side cross-sectional view of the that in the vegetable compartment. The coils may be of any suitable structure such as of sinuous" configuration having fins disposed in the manner as shown more clearly in Figure 3, the coils forming a gravity type evaporator. The vegetable compartment may be illuminated by a light 23 such as a fluorescent light located just behind the hood 2, which light, of course, will also illuminate the dairy products compartment.

At the bottom of the refrigerator casing cor chassis, there is provided a storage cabinet or compartment 24, which is closed by means of front hinged doors 25 and 26 provided with suitable handles 2! and 28, respectively. Thedoors 25 and 26 may be provided with glasspanes (not shown) in the event the lower storage compartment is to serve as a display compartment ias well. The lower compartment is refrigerated by means of the gravity type evaporator coil "38.

The refrigeration system is shown in fFi-gure 2 and operates in the following manner:

Refrigerating liquid of anysuitable type; such hs'zmethyl chloride, is fed into the system by meansof :theliquid pipe line 29 and converges-at a "1'30 whereuponit-divides,,,1 art of it flowingto an expansion valve 31 and the other part-to an ex- ,pansion valve 32 -of any suitable and well-known type. These expansion valves may be made of the same capacity if so desired. Liquid refrigerant from expansion valve i feeds through lineor pipe 33 to alinestrainert l which strainer is for the purpose of preventing any-dirt particles or oil bubbles from entering :the snap-action valve35 into which the liquid refrigerant subsequently flows. From valve 35, the refrigerant flow s through line v36 to the lower part "of coils 3.

t5 *in the dairy products compartment, thereafter flowing through the length of the coil, thence ,down through line 31 into the upper part .of coil 38 in the storage compartment, thence through the-coiltli and finally emergingfrom ,line 739, T

,40 and suction line .14l. Suction line 4| .is conhectedtoa compressor 42 and condenser 43-which is cooledby a'fan :44 driven by-an electric motor The snap action valve 3511s for the purpose -of controlling the temperature of the upper dairy compartment-and the lower storage compartment throughanair bulb 41 located in the lower storage compartment. This valve preferably has a "temperature range of from 20F. to F.-with a set diiferential of 4 F. The function of this valve is to shut off the flow of the liquid refriger ant to the blower evaporator coil l5 and the gravity evaporator coil 38 when-the: properset t m erature is reach d in these two compart- .ments- It will be noted that the snap :action .va-lve is located in the forward end rather than at the tail end of the evaporator toprevent liquid flooding of the evaporator by theexpansion valve 7 (5| when the snap action valve is closed, thereby preventing frost back on suction line 4|. 7

A The portion of the liquid refrigerant that is fed into expansion valve 32 flows through pipe.

line 4 6 to the upper coil I!) in the vegetable .eom-

part ment, "traversing the length of the coil,. thencetothetop of 'coil 20 (the coils beingconnectediin series at the corner as shown) and emer ing from the bottom of the coil 20 .to T 58 thereby joining the liquid refrigerant returning from the dairy and storage compartments and thence flowing out into suction line AL ,Thus, it will be seen that two parallel lines or branches are provided which emerge from the respective expansion valves, one flowing-only to the vegetable compartment and the other flowing refrigerant on suction line 4|. naturally is performed on the exact opposite first to the dairy compartment and then to the storage compartment, all the aforementioned coils being finally connected to a common return or suction line. This enables greater refrigeration of the vegetable bin which is usually necessary in view of its being permanently open at the top. Of course, if the vegetable container were much smaller and particularly if the dairy products and storage cabinets were rather large it ,m'ight'be necessary to decrease the capacity of the expansion valve leading to the vegetable compartment, or to otherwise provide more refrigerationwfor the dairy and storage compartments.

For defrosting purposes a hot gas defrost line Allis-provided into which hot gases may be fed by openin .of the defrosting valve 49. The hot gas ime feeds into T 50 and: is diverted to separate lines flowing through check valves SI expansion valve 3| continues to -feed .its part of the system, the check valves ,5! and p52 will, prevent the fioodingof theevaporator or, coils J9 and 29, thereby preventing a possible jfrost back of This function operation of the twoexpansion valves;

Thus, it will be seen that in accordance with the present invention, there is provided a unitary refrigerator in which a single evaporator supplies three separate refrigeration compartments, consisting of an upper dairy display compartment, a middle open-type vegetable display compartment, and a lowermost storage or display compartment suitable for either vegetables, dairy products, or both, which compartments aremaintained at separate temperatures. There is provided ,a unique inset arrangement of the dairy products upper compartment'to allow ,a person to "extend his head through the front opening and reach down into the vegetable display bin or compartment to freely ,help himself to the vegetables or other products which maybe stored therein; also there Iis provided a refrigerating system having two branch linear-one whichifeeds the dairy products compartment and storage compartment and the other which feeds the vegetable compartment, thereby insuring greater flow of refrigerating liquid in the vegetable compartment which normally requires greaterre- 'frigeration since it is permanently open at the top; also'there is provided a 3-in-1 refrigerator which enables a storekeeper of a small store to refrigerate dairy products, vegetables and'sim lar products in a single .casing, thereby reducing costs and at the same time employing in a single struoturedisplays of dairy products and vegetables in a manner that is not only attractive but 7 bottom of the refrigerator casing, in which event the storage compartment is preferably ,eliminated. r V 4 While for'purposes of illustration only, a=single embodiment of the invention is shown ..in the drawings, it should be noted that thisis merely by way of example and that other "modifications will bereadily suggested to those skilled in the art after'having the benefit of the teachings of the present invention, hence the present invention should not be restricted except insofar as set forth in the following claims. 1

I claim:

1. A multi-compartment refrigerator comprising a thermally insulated casing including a vertical front wall having a permanently open front opening in its upper part, in a vertical plane, bounded on all sides by easing structure, a cabinet within the upper portion of said casing inset with respect to said front opening, having its front parallel to said opening, and provided with door closures, a refrigerated open compartment disposed beneath said cabinet and extending forwardly thereof below said front opening thereby permitting a user to lean into said opening and help himself to products contained in said compartment, and means for refrigerating said cabinet and compartment.

2. A refrigerator having a front wall including a hood depending from the top thereof, said front wall having a large opening co-extensive with the width of the refrigerator, a refrigerated cabinet inset with respect to said hood and opening and disposed in the upper portion of said refrigerator, horizontally slidable doors for closing the front of said cabinet, an open type refrigerated bin disposed beneath said cabinet and extending below the lower edge of said front opening so that the user may extend his head into said front opening and help himself to products contained in said bin, and means for refrigerating said cabinet and said bin.

3. A multi-compartment type refrigerator having a front wall provided with an enlarged opening, a hood depending from the top of said front wall, a dairy products cabinet inset with respect to said wall and including a horizontal shelf and a vertical wall with horizontally sliding doors, said vertical wall being in spaced relationship with said refrigerator front wall, a blower fan type evaporator contained within said dairy products cabinet, a vegetable bin disposed centrally of said refrigerator and beneath said dairy products cabinet and including gravity type evaporator extending along the roof and rear walls thereof together with louvres for concealing said coils, said bin including a plurality of vertically disposed partitions and being exposed at the top and accessible through said front opening so that one may lean into said opening and help himself to vegetables contained in said bin, a lowermost storage compartment having doors at the front thereof for closing the compartment and including an evaporator, and refrigeratin means including said evaporators in said cabinet, bin and compartment for maintaining separate and refrigerated temperatures therein.

4. Apparatus recited in claim 3 wherein said last named refrigerating means includes a liquid refrigerant supply line and a pair of expansion valves into which different portions of said liquid are diverted, one of said expansion valves feeding said dairy products cabinet and storage compartment evaporators and the other of said expansion valves feeding said evaporator contained in said vegetable bin.

width of the refrigerator and with a substantial portion of the height thereof, a dairy compartment having doors and being inset with respect to said front wall at the upper portion of the refrigerator, a vegetable compartment having a top which is permanently open and exposed to said opening, a closed storage compartment including doors and disposed beneath said vegetable compartment and means for refrigerating said respective compartments at different temperatures including a liquid refrigerant line, a pair of expansion valves into which portions of the liquid refrigerant are fed, and evaporator coils disposed in each of said compartments, one of said expansion valves feeding, the dairy and storage compartments and the other of said expansion valves feeding the vegetable compartment. 7

6. Apparatus as claimed in claim 5, including a hot gas defrost line connected to said expansion valves and including check valves for preventing the flooding of said evaporator coils.

'7. A multi compartment refrigerator comprisin a cabinet having front, rear, end, top and bottom walls incorporating thermal insulation, the front wall having an opening extending from an intermediate point in the height of said front Wall to a point adjacent the top, and substantially from end to end of the cabinet bounded on all sides by the wall structure of said cabinet, a transverse partition at a level below the bottom of said opening extending from back wall to front wall, defining with the cabinet structure below it a storage chamber, a second transverse partition at a level intersecting the area of said opening intermediately, extending from said back wall but terminating short of the plane of said front wall, an upper compartment of which said second transverse partition forms the bottom, having a front wall inset from the front wall of said cabinet and provided with doors, said transverse partitions defining between them and with the intervening cabinet structure an intermediate open compartment, said upper and intermediate compartments being accessible through the opening in said front wall, and means for refrigerating said compartments.

8. A multi compartment refrigerator as claimed in claim 7, said refrigerating means being so correlated as to provide a different datum temperature for each compartment.

VIRGIL P. WARREN, II.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,204,263 Fratt Nov. 7, 1916 1,541,769 Platter June 9, 1925 1,893,560 Mezzapesa Feb. 21, 1933 1,955,186 Hill Apr. 17, 1934 2,119,422 Cruse May 31, 1938 2,408,469 Van Doren Oct. 1, 1946 2,476,491 Henderson July 19, 1949 2,522,090 Brill Sept. 12, 1950

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